Photos – Cadwalader Ringgwald

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Ringgold 1850 Chart of San Francisco Bay

Cadwalader Ringgold was the first President of the Board of Pilot Commissioners. As you can see from this chart, he was also an excellent draftsman and a skilled cartographer.

Commander Ringgold’s chart is of extreme historical interest. It shows the depths in San Francisco Bay prior to the era of hydraulic mining in the 1880s as well as the original extent of the City of San Francisco and even the site of Mission San Rafael.


Contact Information

Board of Pilot Commissioners For the Bays of San Francisco, San Pablo, and Suisun
660 Davis Street
San Francisco, CA 94111
TEL (415) 397-2253
FAX (415) 397-9463

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